Commit 7b1e35f6 authored Sep 09, 2005 by NeilBrown Committed by Linus Torvalds Sep 09, 2005

[PATCH] md: allow hot-adding devices to arrays with non-persistant superblocks.



It is possibly (and occasionally useful) to have a raid1 without persistent
superblocks.  The code in add_new_disk for adding a device to such an array
always tries to read a superblock.

This will obviously fail.

So do the appropriate test and call md_import_device with
appropriate args.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 3178b0db

drivers/md/md.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -2226,8 +2226,11 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
		mdname(mddev));
		return -EINVAL;
		}
		if (mddev->persistent)
		rdev = md_import_device(dev, mddev->major_version,
		mddev->minor_version);
		else
		rdev = md_import_device(dev, -1, -1);
		if (IS_ERR(rdev)) {
		printk(KERN_WARNING
		"md: md_import_device returned %ld\n",